JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Xueyan Li,Di Wu,Qingzhi Luo,Rong Yin,Jing An,Sijie Liu,Desong Wang
The novel ternary cyclized polyacrylonitrile (CPAN)/Ag/AgCl composites were successfully synthesized by a facile precipitation and photo-assistant reduction method. The CPAN/Ag/AgCl particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy, UV–vis diffuse reflectance spectroscopy (UV–vis DRS), photoluminescence spectroscopy (PL), electrochemical impedance spectra (EIS) and photocurrent time (EI) measurement. The photocatalytic activities of the samples were investigated through the decomposition of methyl orange (MO) and rhodamine B aqueous solution under visible-light irradiation. The results showed that the CPAN/Ag/AgCl photocatalysts displayed much higher visible-light photocatalytic activity than Ag/AgCl, and the reaction rate constant of the MO degradation catalyzed by CPAN/Ag/AgCl is about 3 times of that by Ag/AgCl. It is proposed that the photogenerated holes h + and O 2 − played important roles in the photocatalytic degradation of MO in the presence of CPAN/Ag/AgCl composites under visible light irradiation.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 3
·1-12
·
IF 5.3
Wang Zhencui,Du Jie,Zhang Xianman,Guo Zhizhong,Zhang Zhenyu,Wen Wei
Three-dimensional TiO 2 hierarchical nanowire arrays were synthesized featuring nanocavities via a hydrogen peroxide–assisted wet chemical reaction, followed by a simple liquid-phase deposition process. We subsequently decorated the TiO 2 arrays with dopamine, leveraging its enediol ligand for chelation. Reduced nicotinamide adenine dinucleotide (NADH), a cofactor for over 300 dehydrogenases, serves as the targeted analyte to assess the PEC sensing performance of the sensor. The developed sensor exhibited a linear concentration range for NADH detection of 0.05 to 50 µM, achieving a high sensitivity of 0.29 μA∙μM −1 ∙cm −2 and a low detection limit of 0.03 μM (signal-to-noise ratio of 3). Notably, PEC performance of the resulting sensor surpassed that of commercial TiO 2 (P25)-based sensors. The enhanced sensing capabilities can be attributed to several factors: the TiO 2 hierarchical nanowire arrays with nanocavities provide a larger surface area, abundant active sites, and shorter molecular diffusion lengths for surface adsorption and reaction, thereby reducing response times and improving sensitivity. Additionally, the coupling of TiO 2 with dopamine enhances visible light absorption and optimizes charge transfer dynamics. These findings open a new avenue for designing high-performance three-dimensional nanoarchitectures for PEC sensing applications. Graphical
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Carbon Letters
·
2024
·
IF 5.5
Liu Rui,Zhang Xin,Han Xue,Sun Yuan,Jin Shuang,Liu Ri-jia
Fe 3 O 4 /g-C 3 N 4 /TiO 2 catalyst has been fabricated using a simple ultrasonic method with high photocatalytic activity. The morphology, structure and optical properties of Fe 3 O 4 /g-C 3 N 4 /TiO 2 were systematically investigated by a variety of characterization techniques. The optimum degradation conditions were investigated by degrading tetracycline (TC) under visible light irradiation. The results showed that the degradation efficiency was the highest when the initial TC concentration was 5.0 mg/L, the pH value was 11 and the catalyst dosage was 1.0 g/L. After 100 min of visible light irradiation, the degradation efficiency of TC achieved at 73.61%, which was 1.64 and 1.19 times that of g-C 3 N 4 and Fe 3 O 4 /g-C 3 N 4 , respectively. Moreover, Fe 3 O 4 /g-C 3 N 4 /TiO 2 had good stability and recyclability. The results of capture experiments showed that ‧O 2 − and ‧OH were the main active species during the photocatalytic process, and a possible photocatalytic reaction mechanism of Fe 3 O 4 /g-C 3 N 4 /TiO 2 catalyst was proposed. This study provides a new way to improve the photocatalytic performance of g-C 3 N 4 , which has great potential in degrading pollutants such as antibiotics in wastewater.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Limin Zhang,Jianhao Liu,Pengyu Shang,Xiao-Fang Jiang,Xiaowen Hu,Guofu Zhou
Utilizing the photothermal effect to fabricate light-driven liquid crystal elastomer (LCE) actuators is an effective approach. Gold nanorods (GNRs) are considered as one of the ideal materials for preparing light-driven LCE actuators due to their outstanding photothermal conversion capabilities induced by localized surface plasmon resonance. However, the poor miscibility of pristine GNRs with liquid crystals has limited the performance of the actuators. Here, we report the organic molecule-mediated formation of GNR–dopamine hybrids, which enables a polydopamine (PDA) layer on the surface of GNRs. PDA coating not only serves as a robust polymeric surfactant for the underlying GNRs but also exhibits a broadband absorption, resulting in enhanced photothermal effect. Our results show that the PDA-coated GNRs (G-P) exhibit superior photothermal performance compared with the pristine GNRs. Under the irradiation of 880 nm near-infrared (NIR) light with intensity of 0.8 W cm–2, the G-P-doped composite LCE film can achieve contraction to lift an object of 0.2 g to a height of 2 mm in 2 s, which is twice as fast as the time required for pristine GNR-doped LCE. Furthermore, we have demonstrated a light-driven LCE actuator based on a bilayer membrane by combining the G-P-doped composite LCE film with a polypropylene film. The LCE actuator can be bent rapidly under the NIR light illumination. This PDA-enabled strategy affords a rational design for fast-responsive light-driven LCE actuators and provides more opportunities for other types of light-stimulated responsive devices based on the photothermal effect.
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Heliyon
·
2024
·
IF 3.4
Shibin Wu,Jingguang Wang,Zhenze Xie,Chang Du
Nano-TiO 2 photocatalysis technology has attracted wide attention because of its safety, nontoxicity and long-lasting performance. However, traditional nano-TiO 2 has been greatly limited in its application because its wide band gap can only be activated by ultraviolet light (λ < 387 nm). In this paper, nano-TiO 2 was prepared by self-doping method. The synthesized nano-TiO 2 was a single anatase crystal type with a particle size of 10 nm and uniform size. In addition, nano-TiO 2 has high stability and good dispersion. More importantly, nano-TiO 2 exhibits excellent visible light (400–780 nm) activity due to the decrease of bandgap from 3.20 eV to 1.80 eV (less than 2.0 eV) and the presence of a large number of hydroxyl groups on the surface of the nanoparticles. In the antibacterial test, the antibacterial rate of both E.coli and S.aureus was close to 100 % under the irradiation of household low-power LED lamps, showing excellent antibacterial performance, indicating that the prepared nano-TiO 2 has broad application prospects in the field of bactericidal and bacteriostatic.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Li Yanming,Deng Ming,Zhang Xuanyu,Xu Ting,Wang Ximeng,Yao Zhiwei,Wang Qiangqiang,Qian Lei,Xiang Chaoyu
Even though lead halide perovskite has been demonstrated as a promising optoelectronic material for next-generation display applications, achieving high-efficiency and stable pure-red (620~635 nm) emission to cover the full visible wavelength is still challenging. Here, we report perovskite light-emitting diodes emitting pure-red light at 628 nm achieving high external quantum efficiencies of 26.04%. The performance is attributed to successful synthesizing strongly confined CsPbI 3 quantum dots with good stability. The strong binding 2-naphthalene sulfonic acid ligands are introduced after nucleation to suppress Ostwald ripening, meanwhile, ammonium hexafluorophosphate exchanges long chain ligands and avoids regrowth by strong binding during the purification process. Both ligands enhance the charge transport ability of CsPbI 3 quantum dots. The state-of-the-art synthesis of pure red CsPbI 3 quantum dots achieves 94% high quantum efficiency, which can maintain over 80% after 50 days, providing a method for synthesizing stable strong confined perovskite quantum dots.
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Journal of Materials Chemistry B
·
2025
·Vol. 13
·期 8
·2855-2870
·
IF 5.7
Ji Jiang,Yuan Tian,Xiaoyang Wu,Mingze Zeng,Chengheng Wu,Dan Wei,Hongrong Luo,Jing Sun,Jie Ding,Hongsong Fan
Wound healing is a complex and dynamic biological process that requires meticulous management to ensure optimal outcomes. Traditional wound dressings, such as gauze and bandages, although commonly used, often fall short in their frequent need for replacement, lack of real-time monitoring and absence of anti-inflammatory and antibacterial properties, which can lead to increased risk of infection and delayed healing. Here, we address these limitations by introducing an innovative hydrogel dressing, named PHDNN6, to combine wireless Bluetooth temperature monitoring and light-triggered nitric oxide (NO) release to enhance wound healing and management. The PHDNN6 hydrogel is based on a poly(N-isopropylacrylamide) (PNIPAM) matrix, integrated with methacrylated and dopamine-grafted hyaluronic acid (HA–MA–DA), which allows the dressing to be highly responsive to changes in wound temperature, enabling continuous and real-time monitoring of the wound microenvironment wirelessly. Besides, PHDNN6 is embedded with photothermal polydopamine nanoparticles (PDA NPs) that are loaded with a NO donor, N,N′-di-sec-butyl-N,N′-dinitroso-1,4-phenylenediamine (BNN6). When exposed to near-infrared (NIR) laser irradiation, these PDA@BNN6 nanoparticles release NO to provide potent antibacterial and anti-inflammatory effects. The integration of continuous wireless temperature monitoring with NO release within a single hydrogel dressing represents a significant advancement in clinical wound care. This dual-functional platform not only provides real-time diagnostic capabilities but also offers therapeutic interventions to manage wound infections and promote tissue regeneration. Our research highlights the potential of PHDNN6 to revolutionize wound management by offering a comprehensive solution that addresses both the diagnostic and therapeutic needs in wound healing.
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Nanoscale
·
2024
·Vol. 16
·期 17
·8378-8389
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IF 5.8
Yao Yang,Bin Wang,Qian Liu,Zhenghua Wei,Ziye Mou,Quan Li,Chunfa Chen,Zaichun You,Bang Lin Li,Guansong Wang,Zhi Xu,Hang Qian
Bacterial infection is one of the most serious clinical complications, with life-threatening outcomes. Nature-inspired biomaterials offer appealing microscale and nanoscale architectures that are often hard to fabricate by traditional technologies. Inspired by the light-harvesting nature, we engineered sulfuric acid-treated sunflower sporopollenin exine-derived microcapsules (HSECs) to capture light and bacteria for antimicrobial photothermal therapy. Sulfuric acid-treated HSECs show a greatly enhanced photothermal performance and a strong bacteria-capturing ability against Gram-positive bacteria. This is attributed to the hierarchical micro/nanostructure and surface chemistry alteration of HSECs. To test the potential for clinical application, an in situ bacteria-capturing, near-infrared (NIR) light-triggered hydrogel made of HSECs and curdlan is applied in photothermal therapy for infected skin wounds. HSECs and curdlan suspension that spread on bacteria-infected skin wounds of mice first capture the local bacteria and then form hydrogels on the wound upon NIR light stimulation. The combination shows a superior antibacterial efficiency of 98.4% compared to NIR therapy alone and achieved a wound healing ratio of 89.4%. The current study suggests that the bacteria-capturing ability and photothermal properties make HSECs an excellent platform for the phototherapy of bacteria-infected diseases. Future work that can fully take advantage of the hierarchical micro/nanostructure of HSECs for multiple biomedical applications is highly promising and desirable.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-9
·
IF 15.7
Jia Yuyu,Li Hui,Guo Ning,Li Fengmian,Li Tianchen,Ma Haoran,Zhao Yuyan,Gao Hanfei,Wang Dan,Feng Jiangang,He Zhiyuan,Jiang Lei,Wu Yuchen
Quantum dot light-emitting diodes show great potential for next-generation displays. Although film quantum dot light-emitting diodes have achieved or approached efficiency and stability standards for commercial applications, patterned quantum dot light-emitting diodes, particularly blue quantum dot light-emitting diodes, still face challenges in both efficiency and stability. Traditional patterning methods often lead to defects and disorder, causing non-radiative recombination and reduced performance. Here, we develop an aromatic-enhanced capillary bridge confinement strategy to achieve long-range ordered blue quantum dot microstructure arrays. These quantum dot arrays integrate into quantum dot light-emitting diodes achieve a peak external quantum efficiency of 24.1% and a peak luminance of 101,519 cd m −2 . Additionally, the minimum pixel size is reduced to 3 μm, enabling a maximum resolution exceeding 5000 pixels per inch, and static electroluminescence display modes. This study provides a strategy to advance the commercialization of quantum dot light-emitting diodes.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Wanlin Gan,Zhiwei Yang,Yuhan Zhang,Yu Guo,Jing Zhang
In response to the current demand for the development of efficient and stable photocatalysts for sulfite (S(IV)) activation, this study introduces C 3 N 5 to activate S(IV) under visible-light (VL) irradiation and elucidates the mechanism of the VL/C 3 N 5 /S(IV) system to degrade organic pollutants. The k obs value for the removal of metronidazole in the VL/C 3 N 5 /S(IV) system reached 0.07245 min −1 in 12 min. Subsequently, the activation mechanism of S(IV) and the generation of reactive species were studied. The results indicate that the excellent degradation performance of the VL/C 3 N 5 /S(IV) system is due to the generation of carriers in C 3 N 5 under visible light. The S(IV) reacts with photogenerated holes, producing •SO 4 - and •OH in a chain reaction. This study not only broadens the application scope of C 3 N 5 as a photocatalyst but also presents a novel S(IV) activation strategy, enriching the understanding of S(IV) activation mechanisms.
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LANGMUIR
·
2025
·
IF 3.9
Xi Chen,Xia Sheng,Siyu Zou,Zhiping Liu,Jingyu Lu,Zhaoyue Tan,Xinjian Feng
Semiconductor-mediated photodegradation (SMPD) is a tempting photocatalytic technique that utilizes visible light to decompose toxic organic pollutants but has often hit a bottleneck of poor mineralization. In this study, a triphasic interface is created by fabricating hydrophobic hollow TiO2 nanospheres (HB-HTS) to promote the generation of reactive oxygen species, such as •O2– and •OH, and thereby the kinetics of photo-oxidation reactions. Mechanistically, improving the surface hydrophobicity of hollow catalysts not only facilitates gas storage and augments the O2 supply, but also enhances surface adsorption of dye molecules via hydrophobic interactions, contributing concertedly to the faster photodegradation rate and higher degree of mineralization. Consequently, the optimal photocatalytic system based on HB-HTS, compared to the unmodified and uncarved controls, exhibits much faster kinetics of dye degradation up to 15-fold with almost complete mineralization. This study underlines the regulation of the reaction interfacial microenvironment to leverage the geometrical nanostructure and surface property of semiconductor nanoparticles for enhanced photocatalytic performance.
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ADVANCED POWDER TECHNOLOGY
·
2024
·
IF 4.2
Min Qiu,Xue-Li Yang,Zi-Xuan Zhao,Qiu-Ping Luo,Ling Chen,Jun Du,Xing Fan,Bing-Xin Lei
The separation and transfer of photogenerated charges are limited by the deep energy defects and high exciton binding energy of Cs 2 AgBiBr 6 (CABB). The creation of heterostructure is a great promising path to solve this obstacle. In this paper, BiOBr (BOB) nanosheets epitaxially grew on the surface of CABB octahedrons through immersing CABB into in water-solution with the assistance of ethanol, thereby creating an interesting CABB/BOB heterojunction. The CABB/BOB heterostructure markedly enhances water stability, preserving its structure and morphology even after being submerged in a mixture of ethanol and water for 100 h. The CABB/BOB photocatalyst exhibited significantly enhanced photocatalytic activity towards the degradation of Rhodamine B in comparison to its individual pristine components, namely CABB and BOB. Specifically, the advanced CABB/BOB−90 photocatalyst attains a degradation efficiency of 98 % within 40 min, significantly surpassing the initial CABB and BOB photocatalysts by approximately 1.3 and 4.1 times, respectively. The heightened photocatalytic activity is attributable to the formation of a tightly integrated heterojunction interface, which promotes the efficient separation of charge carriers.
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